TWI401491B - Electronic display apparatus - Google Patents

Description

Electronic display device

The present invention relates to an electronic display device, and more particularly to an electronic display device that can determine a state of rotation using its own optical signal.

As consumer electronics products gradually enter the audio and video application market of the general family, a variety of electronic display devices have been developed for different consumer groups, such as liquid crystal displays, e-books, digital photo frames, digital cameras, mobile phones and personal digital assistants (Personal). Digital Assistant, PDA), etc. With the development of technology, most of the above products have the function of automatically adjusting the display direction.

For example, when the user rotates the electronic display device from the parallel direction to the upright direction, most of the current higher-order electronic display devices can automatically adjust the playback or display direction of the currently displayed icon, photo or movie, thereby cooperating with The user's current viewing angle. In this way, the user can also conveniently change the display angle of the electronic display device to achieve a better viewing effect by using a better aspect ratio.

In order to detect the current state of use of the device, conventional electronic display devices mostly have a tilt sensing module. At present, the tilt sensing module can adopt an Accelerometer, a Ball-Rolling Switch, a Mercury Switch, or a Ball-Rolling Optical Detector. . Thereby, the display mode or the rotation angle of the electronic display device can be determined, and the display mode of the electronic display device can be adjusted correspondingly.

Taking a ball type light sensing module as an example, please refer to FIG. 1 , which illustrates a schematic diagram of a conventional ball type light sensing module 1 . As shown in FIG. 1 , the ball type light sensing module 1 includes a ball 10 , a light emitting element 12 , a plurality of photo sensors 14 , and a judging circuit 16 . Among them, the ball 10 can move freely within a specific rolling space 100. When the device rotates, the ball 10 is affected by the force of gravity or rotation to change its position, and thus may block the light conduction path between the light-emitting element 12 and the light sensors 14, the determination circuit 16 can be based on The sensing signals of the light sensors 14 determine the rotation angle or the orientation of the current device.

In the above-mentioned ball type light sensing module, the detection of the rotation angle mainly depends on the positional movement of the ball, which causes the light conduction path to be blocked. If the ball cannot be smoothly changed due to long-term use, it cannot function normally. In addition, a dedicated light-emitting element is required in the ball-type light sensing module as a source of optical signals for subsequent determination.

On the other hand, in addition to the ball-type light sensing module, the acceleration gauge is expensive; the ball switch uses the metal ball as the electrical connection path, which is prone to contact failure; the mercury switch is poisonous to the human body and the environment due to mercury. Additional processing is required.

In order to solve the above problems, the present invention provides an electronic display device that can utilize its own optical signal to determine the current state of rotation of the device to solve the above problem.

One aspect of the present invention is to provide an electronic display device.

According to a specific embodiment, the electronic display device includes a base, a housing, a backlight module, and a light sensing component. The housing is rotatably pivotally coupled to the base. The backlight module is disposed in the housing, and an opening structure is formed on one of the backlight modules. The backlight module generates a light, and the light is irradiated to the base through the opening structure. The light sensing component is disposed on the base. The light sensing component senses the light and generates a sensing signal when the housing rotates relative to the base.

According to another embodiment, the electronic display device includes a housing, a housing, a backlight module, and a light sensing component. The housing is rotatably pivotally connected to the base body, and an opening structure is defined in the housing. The backlight module is disposed in the housing, and the backlight module generates a light, and the light is irradiated to the base through the opening structure. The light sensing component is disposed on the base. The light sensing component senses the light and generates a sensing signal when the housing rotates relative to the base.

Compared with the prior art, the electronic display device of the present invention has a designed opening structure for introducing light of the backlight module, and the backlight module of the electronic display device itself can be used as a light source for light sensing. In this way, during the rotation of the housing of the electronic display device relative to the base body, when the light is rotated to a specific position to illuminate the light sensing element in the base body through the opening structure, the light sensing element can be utilized. The signal is sensed to know the current state of rotation of the device, thereby switching the display mode of the electronic display device (eg, horizontal, vertical, or correspondingly rotated by a specific angle).

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

Referring to FIG. 2A and FIG. 2B, FIG. 2A is a perspective view of the electronic display device 3 according to an embodiment of the present invention, and FIG. 2B is a view showing another view of the electronic display device 3. In practical applications, the electronic display device 3 can be a liquid crystal display, an e-book, a digital photo frame, a digital camera, a mobile phone, and a Personal Digital Assistant (PDA), which can be widely used in various occasions such as home, entertainment, or business to display a specific Output image (such as TV screen, movie play or work briefing, etc.).

It should be particularly noted that the electronic display device 3 of the present invention has two portions that are relatively movable. In this embodiment, the electronic display device 3 includes a body 30 and a housing 32 that are pivotally connected to each other. In practical applications, the base 30 can be placed or fixed on an external surface for supporting the electronic display device 3, and the housing 32 can be rotated relative to the base 30.

Referring to FIG. 3, FIG. 3 is a schematic diagram showing an explosion of the electronic display device 3 according to an embodiment of the present invention. In this embodiment, a pivoting opening 324 is defined in the housing 32. The housing 32 is rotatably pivotally coupled to the base 30 through the pivoting opening 324.

In this embodiment, the electronic display device 3 includes a liquid crystal panel 320 and a backlight module 322. The liquid crystal panel 320 and the backlight module 322 are disposed in the housing 32 and adjacent to each other. The backlight module 322 cooperates with the liquid crystal panel 320 to form a display module, and the display module can be used to display an image.

As shown in FIG. 3, the electronic display device 3 includes a light sensing element 300 and a printed circuit board 302. Wherein, the printed circuit board 302 is disposed on the seat body 30, and the light sensing element 300 is disposed on the printed circuit board 302 in the base 30.

It should be noted that in the electronic display device 3 of the present invention, a designed opening structure 3220 is formed on the back plate of the backlight module 322. When the backlight module 322 emits light, the light generated by the backlight module 322 can pass through the opening structure 3220 and pass through the pivoting opening 324 to the printed circuit board 302 in the base 30.

In this embodiment, according to the shape and position design of the opening structure 3220, the light generated by the backlight module 322 is irradiated onto the printed circuit board 302 corresponding to the opening structure 3220 to form a projection area.

Please refer to FIG. 4A and FIG. 4B. FIG. 4A and FIG. 4B respectively show the relative positions of the opening structure 3220 and the light sensing element 300 when the seat body 30 and the housing 32 are at different rotation angles.

In this embodiment, FIG. 4A is a schematic diagram of the operation when the housing 32 and the display module are in a horizontal direction. In FIG. 4A, the light generated by the backlight module 322 passes through the opening structure 3220 and is irradiated onto the printed circuit board 302 to form a projection area. However, in FIG. 4A, the projection area does not cover the light sensing element 300.

When the user pulls the housing 32 to rotate relative to the base 30 to the vertical direction (ie, as shown in FIG. 4B), the projection area formed by the opening structure 3220 covers the light sensing due to the relative rotation relationship. Element 300, the light sensing element 300 can thereby generate a sensing signal.

The electronic display device 3 can further include a control unit 304, a control list The element 304 is electrically connected to the light sensing element 300. The control unit 304 can switch the image display direction or the switch state of the display module according to the sensing signal.

For example, when the light sensing element 300 generates a sensing signal, the control unit 304 can know that the housing 32 has been rotated from the horizontal direction to the vertical direction, and the screen on the display module can be rotated by 90 degrees.

In the present invention, by providing an appropriate opening structure 3220, the light generated by the backlight module 322 can be utilized as the source of the optical signal determined by the light sensing element 300, and no additional light source is needed. The light sensing element 300 of the present invention has a low installation cost and a simple overall judgment mode, and is suitable for wide use in various electronic display devices having a rotating structure.

In the above embodiment, the specially designed opening structure is provided on the back plate of the backlight module, but the invention is not limited thereto. In another embodiment, the opening structure can also directly open the housing. Referring to FIG. 5, FIG. 5 is a schematic diagram showing an explosion of the electronic display device 3' according to an embodiment of the present invention. As shown in FIG. 5, in the electronic display device 3', a designed opening structure 3220' is opened on the surface of the housing 32' adjacent to the base 30'. The opening structure 3220 ′ is used to guide the light of the backlight module 322 ′ as a light sensing function. The detection mechanism is substantially the same as that of the foregoing embodiment, and details are not described herein.

In this embodiment, the backlight module 322 ′ can use a light-transmitting material as a back plate or a hollow opening on the back plate to facilitate the light to penetrate the back plate and the opening structure 3220 ′ and illuminate the body 30 ′, or The backplane can be omitted directly. In addition, in this embodiment, when the opening structure 3220 ′ is used to guide light, the housing 32 ′ can be pivotally connected to the base 30 ′ through the pivot rail 324 ′, but the invention is not limited thereto. .

In addition, in the above embodiment, the opening structure is a single square hole, and the opening structure provided by the present invention is not limited to a single hole, and the shape is not limited to a square. Referring to FIG. 6 and FIG. 7 , FIG. 6 is a schematic diagram of an opening structure 5220 according to another embodiment of the present invention. FIG. 7 is a schematic diagram showing the operation when the opening structure 5220 of FIG. 6 is used for rotational sensing.

As shown in FIG. 6, the opening structure 5220 can include a plurality of holes (5220a-5220d), which can be opened on the back panel of the backlight module or directly on the housing of the electronic display device. The holes (5220a~5220d) can be designed to have different apertures, and the holes (5220a~5220d) in FIG. 6 are sequentially large to small, but the invention is not limited thereto.

When the housing 52 of the electronic display device is rotated relative to the base 50 to a specific angle (as shown in FIG. 7), the light sensing element 500 in the base 50 can sense a hole passing through it (in this case, a hole). 5220c) light and produces a sensing signal. The signal strength of the sensing signal is related to the aperture of the hole 5220c. Thereby, the control unit of the electronic display device can determine the display signal or the rotation state of the device according to the sensing signal generated by the light sensing component 500 and the signal intensity thereof, thereby performing more diversification. Subsequent actions, such as switching the image display direction of the display module, image display angle or switch state. In practical applications, the opening structure 5220 is not limited to including a total of four holes, and the aperture size and arrangement direction are not limited to the above embodiments, depending on actual needs.

In summary, the electronic display device of the present invention has a designed opening structure for introducing light from the backlight module, and the backlight module of the electronic display device itself can be used as a light source for light sensing. In this way, in an electronic display device When the housing is rotated relative to the base, when the light is rotated to a specific position to illuminate the light sensing element in the base through the opening structure, the sensing signal generated by the light sensing element can be used to know the current The device is rotated and the display mode of the electronic display device is switched.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

1‧‧‧Ball-type light sensing module

10‧‧‧ balls

12‧‧‧Lighting elements

14‧‧‧Light sensor

16‧‧‧Judgement circuit

3, 3'‧‧‧Electronic display device

30, 30', 50‧‧‧ body

300, 500‧‧‧Light sensing components

302‧‧‧Printed circuit board

32, 32', 52‧‧‧ shell

320, 320'‧‧‧ LCD panel

322, 322'‧‧‧ backlight module

324‧‧‧ pivot opening

324'‧‧‧ pivotal track

3220, 3220', 5220‧‧‧ opening structure

5220a, 5220b, 5220c, 5220d‧‧‧ holes

FIG. 1 is a schematic diagram of a conventional ball type light sensing module.

2A is a perspective view of an electronic display device in accordance with an embodiment of the present invention.

FIG. 2B is a perspective view showing another view of the electronic display device of FIG. 2A.

3 is a schematic exploded view of an electronic display device in accordance with an embodiment of the present invention.

FIG. 4A is a schematic diagram showing the relative positions of the opening structure and the light sensing element when the seat and the housing are at a specific rotation angle.

FIG. 4B is a schematic diagram showing the relative positions of the opening structure and the light sensing element when the seat and the housing are at a specific rotation angle.

FIG. 5 is a schematic exploded view of an electronic display device according to an embodiment of the present invention.

6 is a schematic view showing an opening structure according to another embodiment of the present invention.

FIG. 7 is a schematic view showing the operation when the opening structure of FIG. 6 is used for rotational sensing.

3‧‧‧Electronic display device

30‧‧‧ body

300‧‧‧Light sensing components

302‧‧‧Printed circuit board

32‧‧‧ housing

320‧‧‧LCD panel

322‧‧‧Backlight module

3220‧‧‧Open structure

324‧‧‧ pivot opening

Claims (14)

An electronic display device includes: a body; a casing, the casing is rotatably pivotally connected to the base; a backlight module is disposed in the casing, and an opening is formed on one of the backlight modules The backlight module generates a light, and the light is irradiated to the base through the opening structure; a light sensing component is disposed on the base, when the housing rotates relative to the base The light sensing component senses the light and generates a sensing signal by the opening structure; and a control unit is configured to receive the sensing signal and determine a relative rotation of the housing and the body according to the sensing signal status. The electronic display device of claim 1, wherein the light illuminates the opening structure to form a projection area, and when the housing rotates relative to the base body, the projection area covers the light sensation. The light sensing element generates the sensing signal when the component is measured. The electronic display device of claim 1, further comprising a liquid crystal panel disposed in the housing adjacent to the backlight module, wherein the backlight module cooperates with the liquid crystal panel to form a display module, The display module is used to display an image. The electronic display device of claim 3, wherein the control unit is electrically connected to the light sensing component, and the control unit further switches an image display direction or a switch of the display module according to the determination result. status. The electronic display device of claim 1, wherein the opening structure comprises a plurality of holes, the holes are respectively formed on the back plate, and the same Each of the holes has a different aperture diameter. When the housing rotates relative to the base, the light sensing element senses the light passing through one of the holes and generates the sensing signal, and one of the sensing signals has a signal strength. It is related to the diameter of the hole of one of the holes. The electronic display device of claim 5, further comprising a liquid crystal panel disposed in the housing and adjacent to the backlight module, wherein the backlight module cooperates with the liquid crystal panel to form a display module, The display module is used to display an image. The electronic display device of claim 6, wherein the control unit is electrically connected to the light sensing component, and the control unit generates the sensing signal and one of the sensing signals according to the light sensing component. The signal strength produces the determination and thereby switches an image display direction, an image display angle or a switch state of the display module. An electronic display device comprising: a body; a housing rotatably pivotally connected to the base; the housing has an opening structure; and a backlight module disposed in the housing, the backlight The module generates a light, and the light is irradiated to the base through the opening structure; a light sensing component is disposed on the base, and the light is sensed when the housing rotates relative to the base The component senses the light by the opening structure and generates a sensing signal; and a control unit receives the sensing signal and determines a relative rotation state of the housing and the body according to the sensing signal. The electronic display device of claim 8, wherein the light is irradiated onto the base through the opening structure to form a projection area, wherein the housing rotates relative to the base and the projection area covers the light sensation When measuring components, the light sense The sensing component produces the sensing signal. The electronic display device of claim 8, further comprising a liquid crystal panel disposed in the housing and adjacent to the backlight module, wherein the backlight module cooperates with the liquid crystal panel to form a display module, The display module is used to display an image. The electronic display device of claim 10, wherein the control unit is electrically connected to the light sensing component, and the control unit further switches an image display direction or a switch of the display module according to the determination result. status. The electronic display device of claim 8, wherein the opening structure comprises a plurality of holes, the holes respectively opening the housing, and the holes each have a different aperture diameter, when the housing The light sensing element senses the light passing through one of the holes and generates the sensing signal when the body rotates. The signal intensity of one of the sensing signals is related to the hole diameter of the one of the holes. The electronic display device of claim 12, further comprising a liquid crystal panel disposed in the housing and adjacent to the backlight module, wherein the backlight module cooperates with the liquid crystal panel to form a display module, The display module is used to display an image. The electronic display device of claim 13, wherein the control unit is electrically connected to the light sensing component, and the control unit generates the sensing signal and one of the sensing signals according to the light sensing component. The signal strength produces the determination and thereby switches an image display direction, an image display angle or a switch state of the display module.